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Theorem im2anan9 587
Description: Deduction joining nested implications to form implication of conjunctions. (Contributed by NM, 29-Feb-1996.)
Hypotheses
Ref Expression
im2an9.1  |-  ( ph  ->  ( ps  ->  ch ) )
im2an9.2  |-  ( th 
->  ( ta  ->  et ) )
Assertion
Ref Expression
im2anan9  |-  ( (
ph  /\  th )  ->  ( ( ps  /\  ta )  ->  ( ch 
/\  et ) ) )

Proof of Theorem im2anan9
StepHypRef Expression
1 im2an9.1 . . 3  |-  ( ph  ->  ( ps  ->  ch ) )
21adantr 274 . 2  |-  ( (
ph  /\  th )  ->  ( ps  ->  ch ) )
3 im2an9.2 . . 3  |-  ( th 
->  ( ta  ->  et ) )
43adantl 275 . 2  |-  ( (
ph  /\  th )  ->  ( ta  ->  et ) )
52, 4anim12d 333 1  |-  ( (
ph  /\  th )  ->  ( ( ps  /\  ta )  ->  ( ch 
/\  et ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107
This theorem depends on definitions:  df-bi 116
This theorem is referenced by:  im2anan9r  588  trin  4036  xpss12  4646  f1oun  5387  poxp  6129  brecop  6519  enq0sym  7247  genpdisj  7338  tgcl  12243  txlm  12458
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